AISI 1144 Steel, oil quenched 845°C (1550°F), 595°C (1100°F) temper, 25 mm (1 in.) round

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AISI 1144 Steel, oil quenched 845°C (1550°F), 595°C (1100°F) temper, 25 mm (1 in.) round
Categories:	Metal; Ferrous Metal; Carbon Steel; AISI 1000 Series Steel; Medium Carbon Steel
Material Notes:	Applications include cold drawn or finished bar, cold punched nuts, split rivets, machine screws, and wood screws. Post oil quenched hardness: 36 HRC surface, 29 HRC half-radius, 24 HRC center.
Key Words:	UNS G11440, ASTM A29, ASTM A108, ASTM A311, FED QQ-S-637 (C1144), SAE J403, SAE J412, SAE J414
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Physical Properties	Original Value	Comments

Density	7.87 g/cc	Typical for steel.

Mechanical Properties	Original Value	Comments
Hardness, Brinell	212
Hardness, Knoop	235	Converted from Brinell
Hardness, Rockwell B	94	Converted from Brinell
Hardness, Rockwell C	16	Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers	223	Converted from Brinell
Tensile Strength, Ultimate	710 MPa
Tensile Strength, Yield	470 MPa
Elongation at Break	21.5 %
Reduction of Area	51.4 %
Modulus of Elasticity	200 GPa	Typical for steel
Bulk Modulus	160 GPa	Typical for steel.
Poissons Ratio	0.29	Typical For Steel
Shear Modulus	80.0 GPa	Typical for steel.
Izod Impact	43.0 J	normalized at 900°C (1650°F)
	53.0 J	as rolled
	65.0 J	annealed at 815°C (1500°F)

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000170 ohm-cm @Temperature 20.0 °C	condition of specimen unknown

Thermal Properties	Original Value	Comments
CTE, linear	11.5 µm/m-°C @Temperature 20.0 °C	Typical steel
	12.2 µm/m-°C @Temperature 0.000 - 300 °C	Typical for steel
	13.9 µm/m-°C @Temperature 0.000 - 500 °C	Typical for steel
Specific Heat Capacity	0.472 J/g-°C	Typical steel
Thermal Conductivity	51.9 W/m-K	Typical steel

Component Elements Properties	Original Value	Comments
Carbon, C	0.40 - 0.48 %
Iron, Fe	97.5 - 98.01 %	As remainder
Manganese, Mn	1.35 - 1.65 %
Phosphorus, P	<= 0.040 %
Sulfur, S	0.24 - 0.33 %

References for this datasheet.

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M114CM / 7279

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